AV Fistula Surgery — Creating Access for Dialysis
An arteriovenous (AV) fistula is the gold standard vascular access for hemodialysis. It is a surgical connection between an artery and a vein, usually in the forearm, that creates a strong, high-flow vessel suitable for repeated needle insertions during dialysis. AV fistulas last longer, have fewer complications, and are preferred over catheters and grafts for long-term dialysis access.
Why is an AV Fistula Needed?
Hemodialysis requires access to your blood flow at a rate of 200-400 ml/min. Normal veins cannot provide this flow. An AV fistula connects a high-pressure artery to a vein, causing the vein to enlarge and strengthen (maturate) over 6-8 weeks. Once mature, the fistula can be needled repeatedly for years without the complications associated with catheters and grafts.
Types of AV Fistula
Radiocephalic Fistula (Wrist)
Connects the radial artery to the cephalic vein at the wrist. This is the most preferred first option because it preserves veins higher up the arm for future access if needed. Takes 6-8 weeks to mature. Suitable when forearm vessels are adequate.
Best for: First-time dialysis access, good forearm vessels
Brachiocephalic Fistula (Elbow)
Connects the brachial artery to the cephalic vein at the elbow. Larger vessel, higher flow, faster maturation (4-6 weeks). Used when wrist vessels are too small or have been used before. Higher risk of steal syndrome.
Best for: Small forearm veins, urgent dialysis need
The Surgery
AV fistula creation is a minor surgical procedure:
- Done under local anaesthesia (you are awake but the area is numbed)
- Small incision (3-5 cm) over the wrist or elbow
- Surgeon connects the artery to the vein using fine sutures under magnification
- You can hear a thrill (buzzing sensation) over the fistula — this confirms good flow
- The wound is closed with stitches and a bandage is applied
- Procedure takes 30-60 minutes
- You go home the same day
Maturation (6-8 Weeks)
After surgery, the fistula needs time to mature:
- •Vein enlarges and thickens due to increased blood flow
- •A thrill (vibration) should be felt over the fistula daily
- •Maturation typically takes 6-8 weeks (some fistulas mature faster)
- •Fistula exercises (squeezing a rubber ball) may be recommended
- •Weekly assessment by Dr. Goel to check maturation progress
- •Dialysis can begin once the vein is at least 6mm diameter and shallow enough to needle safely
Care Tips
Signs of Problems
Seek immediate medical attention if you notice:
- Thrill disappears or becomes weak
- Arm becomes cold, blue, or numb
- Severe swelling of the hand on the fistula side
- Signs of infection — redness, warmth, pus, fever
- Bleeding from the fistula site that doesn't stop
- Pain at the fistula site
Alternatives
AV Graft
A synthetic tube connects an artery to a vein. Used when veins are not suitable for a fistula. Can be used sooner (2-3 weeks) but has higher infection and clotting rates.
Permacath (Catheter)
A temporary catheter placed in a large vein. Used for immediate dialysis while waiting for fistula to mature. Higher infection risk — not ideal for long-term use.
Plan Your Dialysis Access
Dr. Rajesh Goel evaluates your vessels and creates a personalised access plan. Early fistula creation (before dialysis is needed) ensures you have a mature access when the time comes.